Producing One _TEXT Segment for Multiple Object Modules

Last reviewed: July 17, 1997
Article ID: Q43128

6.00 6.00a 6.00ax 7.00 | 6.00 6.00a | 1.00 1.50

MS-DOS                 | OS/2       | WINDOWS

kbtool

The information in this article applies to:

   The Microsoft C/C++ Compiler (CL.EXE) included with:
    - Microsoft C for MS-DOS, versions 6.0, 6.0a, and 6.0ax
    - Microsoft C for OS/2, versions 6.0 and 6.0a
    - Microsoft C/C++ for MS-DOS, version 7.0
    - Microsoft Visual C++ for Windows, versions 1.0 and 1.5

SUMMARY

When Microsoft C compiles an applicaiton in the medium or large memory model, it produces multiple code segments. Each logical code segment has a name of the following form <modulename>_TEXT. In an application built with the small or compact memory model, the compiler generates only one logical code segment, named _TEXT.

MORE INFORMATION

A map file lists the names of each segment and the information each segment contains. To generate a map file, specify the /Fm compiler option switch or the /M linker option switch.

The following excerpt from a map file shows the segments generated linking an application with two object modules that were compiled in the small memory model:

   Start  Stop   Length Name                   Class
   00000H 016EAH 016EBH _TEXT                  CODE

The following excerpt from a map file shows the segments generated linking an application with two object modules that were compiled in the large memory model:

   Start  Stop   Length Name                   Class
   00000H 0000DH 0000EH MAPL_TEXT              CODE
   0000EH 00023H 00016H MAP2_TEXT              CODE
   00024H 01B2CH 01B09H _TEXT                  CODE

MAPL_TEXT and MAP2_TEXT contain the code contained in the MAPL.OBJ and MAP2.OBJ files, respectively. The _TEXT segment contains code from the Microsoft run-time library and any other libraries.

Additional reference words: kbinf 1.00 1.50 6.00 6.00a 6.00ax 7.00 7.00a
8.00 8.00c
KBCategory: kbtool
KBSubcategory: CLIss
Keywords : kb16bitonly

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Last reviewed: July 17, 1997
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